JP3505696B2 - Rotary blade protection cover - Google Patents
Rotary blade protection coverInfo
- Publication number
- JP3505696B2 JP3505696B2 JP16590595A JP16590595A JP3505696B2 JP 3505696 B2 JP3505696 B2 JP 3505696B2 JP 16590595 A JP16590595 A JP 16590595A JP 16590595 A JP16590595 A JP 16590595A JP 3505696 B2 JP3505696 B2 JP 3505696B2
- Authority
- JP
- Japan
- Prior art keywords
- protective cover
- rotary blade
- compression spring
- holding member
- long groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Sawing (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、例えばコンクリート
やアスファルト道路舗装などを切断する携帯用丸鋸など
のいわゆるエンジンカッターの回転刃の保護カバーの改
良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a protective cover for a rotary blade of a so-called engine cutter such as a portable circular saw for cutting concrete or asphalt road pavement.
【０００２】[0002]
【従来の技術】図６は従来の回転刃の保護カバーを備え
たエンジンカッターの側面図で、１はエンジンカッター
本体、２はエンジンカッター本体側に設けたギアボック
スで、このギアボックス２の中には、図示しないエンジ
ンから伝動されて回転する傘歯車と、フレームチューブ
３の中に配設され回転刃４に回転力を伝動させる伝動シ
ャフトの一端に設けた傘歯車とが噛合されて収納されて
いる。２′は回転刃４の側に設けたギアボックスで、こ
のギアボックス２′の中には、前記伝動シャフトの他端
に設けた傘歯車と、回転刃４の回転軸に設けた傘歯車と
が噛合されて収納されている。2. Description of the Related Art FIG. 6 is a side view of an engine cutter having a conventional rotary blade protective cover, 1 is an engine cutter body, 2 is a gear box provided on the engine cutter body side, Is housed in mesh with a bevel gear that is transmitted from an engine (not shown) to rotate, and a bevel gear that is provided in one end of a transmission shaft that is disposed in the frame tube 3 and that transmits a rotational force to the rotary blade 4. ing. Reference numeral 2'denotes a gearbox provided on the rotary blade 4 side. In the gearbox 2 ', a bevel gear provided on the other end of the transmission shaft and a bevel gear provided on the rotary shaft of the rotary blade 4 are provided. Are meshed and stored.
【０００３】５は扇形状の回転刃の保護カバー、５′は
この回転刃の保護カバー５の側面に設けた補強板で、こ
の扇形状の回転刃の保護カバー５および補強板５′の要
部が、回転刃４の図示しない回転軸の回りに回動自在に
支持されるとともに、回転刃の保護カバー５および補強
板５′の側面の前記回転刃４の回転軸から所定半径離れ
た位置に円弧状の長溝５ａが設けられ、この円弧状の長
溝５ａの中に収納された引張コイルスプリング６の一端
が回転刃の保護カバー５の側面の固定部５ｂに固定さ
れ、引張コイルスプリング６の他端が、前記フレームチ
ューブ３に設けた固定部材７に固定されて、回転刃の保
護カバー５が矢印で示すように時計方向に回動付勢され
ている。８1 および８2 はエンジンカッター本体１に設
けたハンドル、８3 は回転刃４の側に設けたハンドルで
ある。Reference numeral 5 is a fan-shaped rotary blade protective cover, and 5'is a reinforcing plate provided on the side surface of the rotary blade protective cover 5. The fan-shaped rotary blade protective cover 5 and the reinforcing plate 5'are required. The portion is rotatably supported around a rotary shaft (not shown) of the rotary blade 4, and a position on the side surface of the protective cover 5 and the reinforcing plate 5 ′ of the rotary blade 4 separated from the rotary shaft of the rotary blade 4 by a predetermined radius. A circular arc-shaped long groove 5a is provided on one side, and one end of the tension coil spring 6 housed in the circular arc-shaped long groove 5a is fixed to a fixed portion 5b on the side surface of the rotary blade protective cover 5 so that the tension coil spring 6 The other end is fixed to a fixing member 7 provided on the frame tube 3, and the protective cover 5 of the rotary blade is urged to rotate clockwise as indicated by an arrow. 8 1 and 8 2 are handles provided on the engine cutter body 1, and 8 3 is a handle provided on the rotary blade 4 side.
【０００４】この従来例のエンジンカッターの回転刃４
の下方部分でワークＷを切断する場合には、このワーク
Ｗに回転刃の保護カバー５の下方の先端部５ｃが突き当
たって、この回転刃の保護カバー５が前記引張コイルス
プリング６に抗して反時計方向に回動し、切断が終わる
と、回転刃の保護カバー５は前記引張コイルスプリング
６に引っ張られて元の回動位置に復帰する。The rotary blade 4 of this conventional engine cutter
When the work W is to be cut at the lower part of the, the tip 5c of the lower part of the rotary blade protection cover 5 abuts against the work W, and the rotary blade protection cover 5 resists the tension coil spring 6. When the blade is rotated counterclockwise and the cutting is finished, the protective cover 5 of the rotary blade is pulled by the tension coil spring 6 and returns to the original rotation position.
【０００５】図７の（ａ）は他の従来の回転刃の保護カ
バーを備えたエンジンカッターの側面図、同（ｂ）は回
転刃の保護カバーの固定部を示す図であり、前記図６に
示す従来例と相違する点について説明すると、回転刃の
保護カバー５の補強板５′の側面の前記回転刃４の回転
軸から所定半径離れた位置に円弧状に所定間隔をおいて
小孔９を多数穿設し、この小孔９に着脱自在なピン１０
が、回転刃４へ回転力を伝動させる伝動シャフトを覆っ
たフレームチューブ３に設けられている。このピン１０
の中程には鍔部１０ａが設けられ、この鍔部１０ａが一
端を封じた筒体１０ｂに摺動自在に挿入され、この筒体
１０ｂと鍔部１０ａとの間には圧縮スプリング１０ｃが
設けられ、ピン１０の一端にはつまみ１０ｄが設けられ
ている。FIG. 7A is a side view of an engine cutter having another conventional rotary blade protective cover, and FIG. 7B is a view showing a fixed portion of the rotary blade protective cover. Explaining the points different from the conventional example shown in FIG. 1, small holes are formed in a circular arc shape at a predetermined distance on the side surface of the reinforcing plate 5'of the protective cover 5 for the rotary blade at a position separated from the rotary shaft of the rotary blade 4 by a predetermined radius. A large number of holes 9 are provided, and a pin 10 that can be freely attached to and detached from this small hole 9
Is provided on the frame tube 3 that covers the transmission shaft that transmits the rotational force to the rotary blade 4. This pin 10
A collar portion 10a is provided in the middle, and the collar portion 10a is slidably inserted into a cylindrical body 10b whose one end is sealed. A compression spring 10c is provided between the cylindrical body 10b and the collar portion 10a. A pin 10d is provided at one end of the pin 10.
【０００６】この従来例のエンジンカッターの場合は、
切断するワークに応じて手動で回転刃の保護カバー５を
回動して所望回動位置に固定する。これをさらに詳細に
説明すると、回転刃の保護カバー５を手動で回動させる
場合には、まず、ピン１０の一端のつまみ１０ｄを引っ
張ってピン１０の先端部を回転刃の保護カバー５の補強
板５′に穿設した小孔９から抜き出す。次ぎに、回転刃
の保護カバー５を手動で所望回動位置に回動させた後
に、前記引っ張っていたピン１０を放すと、ピン１０の
先端部が小孔９に入り、回転刃の保護カバー５が所望回
動位置に固定される。In the case of this conventional engine cutter,
According to the work to be cut, the protective cover 5 of the rotary blade is manually rotated to fix it at a desired rotation position. This will be described in more detail. When the rotary blade protective cover 5 is manually rotated, first, the knob 10d at one end of the pin 10 is pulled to reinforce the rotary blade protective cover 5 so that the tip end of the pin 10 is reinforced. It is pulled out from the small hole 9 formed in the plate 5 '. Next, when the protective cover 5 of the rotary blade is manually rotated to the desired rotational position and then the pin 10 that has been pulled is released, the tip of the pin 10 enters the small hole 9 and the rotary blade protective cover. 5 is fixed at the desired rotation position.
【０００７】[0007]
【発明が解決しようとする課題】前記図６に示す従来例
の場合には、回転刃４の下方部分でワークＷを切断する
場合に、このワークＷに回転刃の保護カバー５の下方の
先端部５ｃが突き当たって、この回転刃の保護カバー５
が前記引張コイルスプリング６に抗して反時計方向に回
動し、切断が終わると、回転刃の保護カバー５は前記引
張コイルスプリング６に引っ張られて元の回動位置に自
動的に復帰する、という作用・効果だけであり、回転刃
４の上方部分でワークＷを切断する場合に、このワーク
Ｗに回転刃の保護カバー５の上方の先端部５ｄが突き当
たった場合にも前記同様の作用・効果が得られるもので
はない。In the case of the conventional example shown in FIG. 6, when the work W is cut at the lower part of the rotary blade 4, the work W is provided with the lower tip of the protective cover 5 of the rotary blade. When the part 5c hits, the rotary blade's protective cover 5
Rotates counterclockwise against the tension coil spring 6, and when cutting is completed, the protective cover 5 of the rotary blade is pulled by the tension coil spring 6 and automatically returns to the original rotation position. When the work W is cut by the upper portion of the rotary blade 4, the same action as described above is applied when the tip 5d above the protective cover 5 of the rotary blade abuts on the work W.・ The effect is not obtained.
【０００８】また、前記図７に示す従来例において、切
断するワークに応じて手動で回転刃の保護カバー５を回
動して所望回動位置に固定する場合には、まず、ピン１
０の一端のつまみ１０ｄを引っ張ってピン１０の先端部
を回転刃の保護カバー５の補強板５′に穿設した小孔９
から抜き出し、次ぎに、回転刃の保護カバー５を手動で
所望回動位置に回動させた後に、前記引っ張っていたピ
ン１０を放すという煩わしい操作を行わなければならな
い、という問題があった。この発明は、ワークを回転刃
の上方側または下方側で切断する場合に、回転刃の保護
カバーの上方の先端部または下方の先端部がワークに突
き当たって、回転刃の保護カバーが時計方向または反時
計方向に回動し、前記突き当てを放すと、回転刃の保護
カバーが自動的に元の位置に回動復帰するようにした回
転刃の保護カバーを提供することを目的とするものであ
る。Further, in the conventional example shown in FIG. 7, when the protective cover 5 of the rotary blade is manually rotated in accordance with the work to be cut and fixed at the desired rotational position, first, the pin 1 is used.
A small hole 9 formed by pulling a knob 10d at one end of the pin 0 so that the tip of the pin 10 is bored in the reinforcing plate 5'of the protective cover 5 of the rotary blade.
There is a problem that it is necessary to perform a troublesome operation in which the pulling pin 10 is released after the protective cover 5 of the rotary blade is manually rotated to a desired rotational position. According to the present invention, when the work is cut above or below the rotary blade, the upper tip or the lower tip of the protective cover of the rotary blade hits the work, and the protective cover of the rotary blade rotates clockwise or It is an object of the present invention to provide a protective cover for a rotary blade, which is rotated counterclockwise and, when the abutment is released, the protective cover for the rotary blade automatically returns to its original position. is there.
【０００９】[0009]
【課題を解決するための手段】この発明は、前記目的を
達成するために、回転刃１１のワークＷに当接させる部
分以外を覆うように回転刃１１の外周に沿って回動する
保護カバー１２を、その回動中心部を回動自在に支持部
材１３で支持して設け、この支持部材１３から所望半径
離れた保護カバー１２の側面に、少なくとも保護カバー
１２の回動範囲の円弧状で凹状の長溝１４ａを有する圧
縮スプリングの摺動保持部材１４を設け、この圧縮スプ
リングの摺動保持部材１４の円弧状で凹状の長溝１４ａ
の底面に穿設した少なくとも保護カバー１２の回動範囲
の円弧状の長孔１４ｂが、軸受ハウジング１５に固定し
た固定ピン１６に摺動自在に嵌合し、この固定ピン１６
を挟んで前記圧縮スプリングの摺動保持部材１４におけ
る保護カバー１２の一方の回動方向側と他方の回動方向
側との前記長溝１４ａにそれぞれ圧縮スプリング１７，
１７′を収納したことを特徴とする回転刃の保護カバー
としたものである。In order to achieve the above-mentioned object, the present invention is a protective cover which rotates along the outer periphery of the rotary blade 11 so as to cover the part other than the part of the rotary blade 11 which abuts against the work W. 12 is provided so that the center of rotation thereof is rotatably supported by a support member 13, and is provided on a side surface of the protective cover 12 distant from the support member 13 by a desired radius in an arc shape of at least a rotation range of the protective cover 12. The slide holding member 14 of the compression spring having the concave long groove 14a is provided, and the arc-shaped concave long groove 14a of the slide holding member 14 of the compression spring is provided.
At least the arc-shaped elongated hole 14b formed in the bottom surface of the protective cover 12 in the rotation range of the protective cover 12 is slidably fitted to the fixed pin 16 fixed to the bearing housing 15.
The compression spring 17 is inserted into the long groove 14a on one side of the protective cover 12 of the slide holding member 14 of the compression spring and the other side thereof on the other side.
This is a protective cover for a rotary blade, which is characterized by containing 17 '.
【００１０】また、回転刃１１のワークＷに当接させる
部分以外を覆うように回転刃１１の外周に沿って回動す
る保護カバー１２を、その回動中心部を回動自在に支持
部材１３で支持して設け、この支持部材１３から所望半
径離れた保護カバー１２の側面に、少なくとも保護カバ
ー１２の回動範囲の円弧状の長溝１４ａを有する圧縮ス
プリングの摺動保持部材１４を設け、この圧縮スプリン
グの摺動保持部材１４の円弧状の長溝１４ａに摺動可能
に収納した圧縮スプリングの押え板１４ｃに穿設した少
なくとも保護カバー１２の回動範囲の円弧状の長孔１４
ｂが、軸受ハウジング１５に固定した固定ピン１６に摺
動自在に嵌合し、この固定ピン１６を挟んで前記圧縮ス
プリングの摺動保持部材１４における保護カバー１２の
一方の回動方向側と他方の回動方向側との前記長溝１４
ａにそれぞれ圧縮スプリング１７，１７′を収納したこ
とを特徴とする回転刃の保護カバーとしたものである。Further, the protective cover 12 which rotates along the outer periphery of the rotary blade 11 so as to cover the portion other than the portion of the rotary blade 11 which is brought into contact with the work W is rotatably supported at its center of rotation. A slide holding member 14 of a compression spring having at least a circular arc-shaped long groove 14a in the rotation range of the protective cover 12 is provided on a side surface of the protective cover 12 which is provided by being supported by the supporting member 13 and has a desired radius. A circular arc-shaped long hole 14 formed in a pressing plate 14c of the compression spring slidably accommodated in the circular arc-shaped long groove 14a of the slide holding member 14 of the compression spring, at least in the rotation range of the protective cover 12.
b slidably fits to a fixed pin 16 fixed to the bearing housing 15, and one side of the protective cover 12 in the sliding holding member 14 of the compression spring and the other side on the other side with the fixed pin 16 sandwiched therebetween. The long groove 14 with the rotation direction side of the
A protective cover for a rotary blade is characterized in that compression springs 17 and 17 'are housed in a, respectively.
【００１１】[0011]
【作用】この発明の回転刃の保護カバーは、前記のよう
な構成にすることにより、回転刃１１の上方部をワーク
Ｗの下方部に押し当てて切断する場合には、前記保護カ
バー１２の上方の先端部１２ａがワークＷに当たって、
保護カバー１２が反時計方向に回動し、圧縮スプリング
の摺動保持部材１４の円弧状で凹状の長溝１４ａに嵌合
した固定ピン１６から保護カバー１２の一方の回動方向
側（図において上方側）の前記長溝１４ａに収納した圧
縮スプリング１７が圧縮され、前記固定ピン１６から保
護カバー１２の他方の回動方向側（図において下方側）
の前記長溝１４ａに収納した圧縮スプリング１７′は圧
縮されない。したがって、ワークＷの切断が終わり、ワ
ークＷとの当接から保護カバー１２を離すと、この保護
カバー１２は前記圧縮されていた圧縮スプリング１７の
反発力で保護カバー１２が時計方向に押されて元の位置
に回動復帰する。The protective cover of the rotary blade of the present invention has the above-mentioned structure, and when the upper portion of the rotary blade 11 is pressed against the lower portion of the work W for cutting, the protective cover 12 is provided. When the upper tip 12a hits the work W,
The protective cover 12 rotates counterclockwise, and one side of the protective cover 12 in one rotation direction (upward in the figure) from the fixing pin 16 fitted in the arcuate concave long groove 14a of the slide holding member 14 of the compression spring. Side), the compression spring 17 housed in the long groove 14a is compressed, and the other side of the fixing pin 16 from the fixing pin 16 in the direction of rotation (the lower side in the drawing).
The compression spring 17 'housed in the long groove 14a is not compressed. Therefore, when the cutting of the work W is completed and the protective cover 12 is separated from the contact with the work W, the protective cover 12 is pushed in the clockwise direction by the repulsive force of the compression spring 17 which has been compressed. It returns to the original position by turning.
【００１２】また、回転刃１１の下方部をワークＷの上
方部に押し当てて切断する場合には、前記保護カバー１
２の下方の先端部１２ｂがワークＷに当たって、保護カ
バー１２が時計方向に回動し、圧縮スプリングの摺動保
持部材１４の円弧状で凹状の長溝１４ａに嵌合した固定
ピン１６から保護カバー１２の他方の回動方向側（図に
おいて下方側）の前記長溝１４ａに収納した圧縮スプリ
ング１７′が圧縮され、前記固定ピン１６から保護カバ
ー１２の一方の回動方向側（図において上方側）の前記
長溝１４ａに収納した圧縮スプリング１７は圧縮されな
い。したがって、ワークＷの切断が終わり、ワークＷと
の当接から保護カバー１２を離すと、この保護カバー１
２は前記圧縮されていた圧縮スプリング１７の反発力で
保護カバー１２が反時計方向に押されて元の位置に回動
復帰する。When the lower part of the rotary blade 11 is pressed against the upper part of the work W for cutting, the protective cover 1 is used.
When the tip end 12b below 2 hits the work W, the protective cover 12 rotates clockwise, and from the fixed pin 16 fitted into the arc-shaped concave long groove 14a of the slide holding member 14 of the compression spring, the protective cover 12 is rotated. The compression spring 17 'housed in the long groove 14a on the other rotation direction side (lower side in the figure) of the above is compressed, and the compression spring 17' from the fixing pin 16 to one rotation direction side of the protective cover 12 (upper side in the figure). The compression spring 17 housed in the long groove 14a is not compressed. Therefore, when the cutting of the work W is completed and the protective cover 12 is separated from the contact with the work W, the protective cover 1
2 is the repulsive force of the compressed compression spring 17, which pushes the protective cover 12 in the counterclockwise direction to return to the original position.
【００１３】[0013]
【実施例】以下、この発明に係る回転刃の保護カバーの
実施例を図面に基づいて詳細に説明する。図１はこの発
明の回転刃の保護カバーを備えたエンジンカッターの斜
視図、図２はこの発明の回転刃の保護カバーの分解斜視
図、図３は図２を反対方向から見た回転刃の保護カバー
の分解斜視図であり、１１は外周部に超硬チップを有し
エンジンを駆動源として回転する回転刃、１２はこの回
転刃１１のワークＷに当接させる部分以外を覆うように
回転刃１１の外周に沿って回動する保護カバーであり、
この保護カバー１２の回動中心部を回転刃１１の支軸等
の支持部材１３によって回動自在に支持されている。Embodiments of a protective cover for a rotary blade according to the present invention will be described below in detail with reference to the drawings. 1 is a perspective view of an engine cutter provided with a rotary blade protective cover of the present invention, FIG. 2 is an exploded perspective view of a rotary blade protective cover of the present invention, and FIG. 3 is a rotary blade of FIG. 2 seen from the opposite direction. It is an exploded perspective view of a protection cover, 11 is a rotary blade which has a carbide tip in an outer peripheral part, and it rotates using an engine as a drive source, 12 rotates so that the part other than the part which contacts the work W of this rotary blade 11 may be covered. A protective cover that rotates along the outer periphery of the blade 11,
The center of rotation of the protective cover 12 is rotatably supported by a support member 13 such as a spindle of the rotary blade 11.
【００１４】１４は前記支持部材１３から所望半径離れ
た保護カバー１２の側面に設けた圧縮スプリングの摺動
保持部材で、図２および図３に示すように、円弧状で横
断面が凹状の長溝１４ａを有し、この円弧状で凹状の長
溝１４ａに後述する圧縮スプリングが摺動自在に収納さ
れる。また、この円弧状で凹状の長溝１４ａの底面に円
弧状の長孔１４ｂが穿設され、頭１６ａが前記円弧状で
凹状の長溝１４ａに隙間を置いて嵌合した固定ピン１６
が前記円弧状の長孔１４ｂに挿通して軸受ハウジング１
５に固定され、この固定ピン１６を挟んだ前記円弧状で
凹状の長溝１４ａに、前記保護カバー１２の一方の回動
方向側（図において上方側）と他方の回動方向側（図に
おいて下方側）とにそれぞれ圧縮スプリング１７，１
７′が収納されている。また、前記圧縮スプリングの摺
動保持部材１４は、図２の（ｂ）に示すように、凹状の
長溝１４ａ（図３参照）の底面に前記保護カバー１２の
回動範囲の円弧状の長孔１４ｂを穿設してもよい。この
ようにすると、収納された圧縮スプリング１７，１７′
に塵埃が付着しなくなる。また、前記圧縮スプリングの
摺動保持部材１４は、図２の（ｃ）に示すように、少な
くとも保護カバー１２の回動範囲の円弧状の長溝１４ａ
を有し、この円弧状の長溝１４ａに摺動可能に収納した
後述する圧縮スプリングを押さえる押え板１４ｃを有
し、この押え板１４ｃに後述する固定ピンが挿通される
少なくとも保護カバー１２の回動範囲の円弧状の長孔１
４ｂが穿設されている。Reference numeral 14 denotes a slide spring holding member for a compression spring, which is provided on the side surface of the protective cover 12 separated from the supporting member 13 by a desired radius. As shown in FIGS. 2 and 3, a long groove having an arc shape and a concave cross section is formed. A compression spring, which will be described later, is slidably housed in the arc-shaped concave groove 14a. Further, a circular arc-shaped long hole 14b is formed in the bottom surface of the circular arc-shaped concave long groove 14a, and a head 16a is fitted in the circular arc-shaped concave long groove 14a with a gap therebetween.
Is inserted into the circular arc-shaped long hole 14b and the bearing housing 1
5 in the arc-shaped concave groove 14a sandwiching the fixing pin 16 and one side of the protective cover 12 in the rotating direction (upper side in the figure) and the other side of the rotating direction (lower side in the figure). Side) and compression springs 17 and 1 respectively
7'is stored. Further, as shown in FIG. 2B, the slide holding member 14 of the compression spring has a circular arc-shaped long hole in the rotation range of the protective cover 12 on the bottom surface of the concave long groove 14a (see FIG. 3). 14b may be drilled. In this way, the stored compression springs 17, 17 '
Dust will not adhere to. Further, as shown in FIG. 2C, the slide holding member 14 of the compression spring has a circular arc-shaped long groove 14a at least in the rotation range of the protective cover 12.
And a pressing plate 14c that presses a compression spring described later that is slidably accommodated in the arc-shaped long groove 14a, and a fixing pin described below is inserted into the pressing plate 14c. Arc-shaped long hole in range 1
4b is provided.
【００１５】この発明の回転刃の保護カバーを図２およ
び図３に示す分解斜視図に従ってさらに詳細に説明す
る。前記保護カバー１２の一方の側面１２ｃに補強板１
２′を当て、この補強板１２′に円弧帯状の圧縮スプリ
ングの摺動当接板１８を当て、この摺動当接板１８に圧
縮スプリング１７，１７′を当て、この圧縮スプリング
１７，１７′に円弧状の圧縮スプリングの摺動保持部材
１４の円弧状で凹状の長溝１４ａを被せて前記各部材を
前記保護カバー１２の一方の側面１２ｃに固定ネジ１９
で固定する。この円弧状の圧縮スプリングの摺動保持部
材１４の円弧状で凹状の長溝１４ａの底面に穿設した円
弧状の長孔１４ｂに、頭１６ａが前記円弧状で凹状の長
溝１４ａに隙間を置いて嵌合した固定ピン１６が前記円
弧状の長孔１４ｂに挿通して軸受ハウジング１５に固定
され、前記円弧状の長孔１４ｂが固定ピン１６に摺動可
能になっている。The protective cover for the rotary blade of the present invention will be described in more detail with reference to exploded perspective views shown in FIGS. The reinforcing plate 1 is provided on one side surface 12c of the protective cover 12.
2 ', the sliding contact plate 18 of an arcuate band-shaped compression spring is applied to the reinforcing plate 12', the compression springs 17 and 17 'are applied to the sliding contact plate 18, and the compression springs 17 and 17' are applied. Is covered with an arcuate concave long groove 14a of the slide holding member 14 of the arcuate compression spring, and each member is fixed to one side surface 12c of the protective cover 12 with a screw 19
Fix with. The head 16a is provided in the arc-shaped concave groove 14a with a gap in the arc-shaped elongated hole 14b formed in the bottom surface of the arc-shaped concave groove 14a of the slide holding member 14 of the arc-shaped compression spring. The fitted fixing pin 16 is inserted into the arc-shaped elongated hole 14b and fixed to the bearing housing 15, and the arc-shaped elongated hole 14b is slidable on the fixing pin 16.
【００１６】前記のように組立られた回転刃の保護カバ
ーを軸受ハウジング１５に回動自在に取付けるには、こ
の軸受ハウジング１５における回転刃１１の回転軸が回
転自在に支持されるベアリングケース部１５′に軸受突
起１５ａが形成され、この軸受突起１５ａの先端に小径
の突起１５ｂが形成されている。そして、前記軸受突起
１５ａに第１のワッシャー２０を嵌合し、その上に補強
板１２′に形成した支持孔１２ｄを嵌合し、この支持孔
１２ｄの上に第２のワッシャー２１を所定の間隙を置い
て対向させるとともに、この第２のワッシャー２１を前
記突起１５ｂに嵌合して、この第２のワッシャー２１を
前記軸受突起１５ａの先端の平面部に固定ネジ２２で固
定する。そして、前記補強板１２′に形成した支持孔１
２ｄを前記軸受突起１５ａに嵌合する時に、予め前記圧
縮スプリングの摺動保持部材１４の円弧状の長孔１４ｂ
に挿通しておいた固定ピン１６を、前記軸受ハウジング
１５に穿設した孔１５ｃに圧入したカラー２３に貫通
し、その貫通した固定ピン１６のネジ部をノブ２４のネ
ジ孔２４ａに螺合して、この回転刃の保護カバーの取付
けが完了する。なお、２５はエンジン本体、２６はハン
ドルである。In order to rotatably mount the protective cover of the rotary blade assembled as described above to the bearing housing 15, the bearing case portion 15 in which the rotary shaft of the rotary blade 11 in the bearing housing 15 is rotatably supported. ′ Has a bearing projection 15a formed thereon, and a small diameter projection 15b is formed at the tip of the bearing projection 15a. Then, the bearing washer 15a is fitted with the first washer 20, the support hole 12d formed in the reinforcing plate 12 'is fitted thereon, and the second washer 21 is provided on the support hole 12d in a predetermined manner. While facing each other with a gap, the second washer 21 is fitted to the protrusion 15b, and the second washer 21 is fixed to the flat surface portion of the tip of the bearing protrusion 15a with a fixing screw 22. The supporting hole 1 formed in the reinforcing plate 12 '
When the 2d is fitted into the bearing protrusion 15a, the arc-shaped elongated hole 14b of the slide holding member 14 of the compression spring is previously formed.
The fixing pin 16 inserted into the bearing housing 15 is passed through the collar 23 press-fitted into the hole 15c formed in the bearing housing 15, and the threaded portion of the passing fixing pin 16 is screwed into the screw hole 24a of the knob 24. Then, the installation of the rotary blade protective cover is completed. In addition, 25 is an engine main body and 26 is a steering wheel.
【００１７】次ぎにこの発明の回転刃の保護カバーの作
動について説明する。図４の（ａ）に示すように、回転
刃１１の上方部をワークＷの下方部に押し当てて切断す
る場合には、前記保護カバー１２の上方の先端部１２ａ
がワークＷに当たって、保護カバー１２が矢印Ａで示す
ように反時計方向に回動し、圧縮スプリングの摺動保持
部材１４の円弧状で凹状の長溝１４ａに嵌合した固定ピ
ン１６の頭１６ａから保護カバー１２の一方の回動方向
側（図において上方側）に収納した圧縮スプリング１７
が圧縮され、前記固定ピン１６の頭１６ａから保護カバ
ー１２の他方の回動方向側（図において下方側）に収納
した圧縮スプリング１７′は圧縮されない。したがっ
て、ワークＷの切断が終わり、ワークＷとの当接から保
護カバー１２を離すと、この保護カバー１２は前記圧縮
されていた圧縮スプリング１７の反発力で保護カバー１
２が時計方向に押されて元の位置に回動復帰する。Next, the operation of the rotary blade protective cover of the present invention will be described. As shown in FIG. 4A, when the upper part of the rotary blade 11 is pressed against the lower part of the work W for cutting, the tip 12a above the protective cover 12 is cut.
Hits the work W, the protective cover 12 rotates counterclockwise as shown by an arrow A, and from the head 16a of the fixing pin 16 fitted in the arcuate concave long groove 14a of the slide holding member 14 of the compression spring. A compression spring 17 housed on one side of the protective cover 12 in the direction of rotation (upper side in the figure).
Is compressed, and the compression spring 17 'housed from the head 16a of the fixed pin 16 to the other rotation direction side of the protective cover 12 (lower side in the drawing) is not compressed. Therefore, when the cutting of the work W is completed and the protective cover 12 is separated from the contact with the work W, the protective cover 12 is repulsed by the compression spring 17 which has been compressed.
2 is pushed in the clockwise direction to return to the original position.
【００１８】また、図４の（ｂ）に示すように、回転刃
１１の下方部をワークＷの上方部に押し当てて切断する
場合には、前記保護カバー１２の下方の先端部１２ｂが
ワークＷに当たって、保護カバー１２が矢印Ｂで示すよ
うに時計方向に回動し、圧縮スプリングの摺動保持部材
１４の円弧状で凹状の長溝１４ａに嵌合した固定ピン１
６の頭１６ａから保護カバー１２の他方の回動方向側
（図において下方側）に収納した圧縮スプリング１７′
が圧縮され、前記固定ピン１６の頭１６ａから保護カバ
ー１２の一方の回動方向側（図において上方側）に収納
した圧縮スプリング１７は圧縮されない。したがって、
ワークＷの切断が終わり、ワークＷとの当接から保護カ
バー１２を離すと、この保護カバー１２は前記圧縮され
ていた圧縮スプリング１７′の反発力で保護カバー１２
が反時計方向に押されて元の位置に回動復帰する。な
お、回転刃１１は矢印Ｃで示すように、時計方向に回転
している。Further, as shown in FIG. 4B, when the lower part of the rotary blade 11 is pressed against the upper part of the work W for cutting, the tip 12b below the protective cover 12 is the work. Upon hitting W, the protective cover 12 rotates clockwise as shown by arrow B, and the fixed pin 1 fitted in the arc-shaped concave long groove 14a of the slide holding member 14 of the compression spring.
A compression spring 17 'housed from the head 16a of No. 6 to the other rotation direction side of the protective cover 12 (lower side in the drawing).
Is compressed, and the compression spring 17 housed from the head 16a of the fixed pin 16 to the one rotation direction side (upper side in the drawing) of the protective cover 12 is not compressed. Therefore,
When the cutting of the work W is completed and the protective cover 12 is separated from the contact with the work W, the protective cover 12 is repelled by the compression spring 17 'which has been compressed.
Is pushed counterclockwise to return to the original position. The rotary blade 11 is rotating clockwise as indicated by arrow C.
【００１９】図５はこの発明の回転刃の保護カバーの他
の実施例を示すもので、前記実施例と相違する点は、圧
縮スプリングの摺動保持部材１４に設ける長溝１４ａ
は、保護カバー１２の回動範囲すなわち固定ピン１６の
頭１６ａに摺動する範囲が円弧状で、それ以外の圧縮ス
プリング１７，１７′が収納される部分は直線状になっ
ている。このように長溝１４ａに直線状の部分があるほ
ど圧縮スプリング１７，１７′の摺動抵抗が少なくな
る。FIG. 5 shows another embodiment of the rotary blade protective cover of the present invention. The difference from the above-mentioned embodiment is that the long groove 14a provided in the slide holding member 14 of the compression spring is different.
Has a circular arc shape in the rotation range of the protective cover 12, that is, a range in which it slides on the head 16a of the fixed pin 16, and the other portions in which the compression springs 17 and 17 'are housed are linear. Thus, the linear portion of the long groove 14a reduces the sliding resistance of the compression springs 17 and 17 '.
【００２０】[0020]
【発明の効果】この発明の回転刃の保護カバーによれ
ば、回転刃の上方部をワークの下方部に押し当てて切断
する場合には、保護カバーの上方の先端部がワークＷに
当たって、保護カバーが反時計方向に回動し、圧縮スプ
リングの摺動保持部材の円弧状で凹状の長溝に嵌合した
固定ピンから保護カバーの一方の回動方向側（図におい
て上方側）に収納した圧縮スプリングが圧縮され、固定
ピンから保護カバーの他方の回動方向側（図において下
方側）に収納した圧縮スプリングは圧縮されず、したが
って、ワークの切断が終わり、ワークとの当接から保護
カバーを離すと、この保護カバーは前記圧縮されていた
圧縮スプリングの反発力で保護カバーが時計方向に押さ
れて元の位置に回動復帰する。また、回転刃の下方部を
ワークの上方部に押し当てて切断する場合には、保護カ
バーの下方の先端部がワークに当たって、保護カバーが
時計方向に回動し、圧縮スプリングの摺動保持部材の円
弧状で凹状の長溝に嵌合した固定ピンから保護カバーの
他方の回動方向側（図において下方側）に収納した圧縮
スプリングが圧縮され、前記固定ピンから保護カバーの
一方の回動方向側（図において上方側）に収納した圧縮
スプリングは圧縮されず、したがって、ワークの切断が
終わり、ワークとの当接から保護カバーを離すと、この
保護カバーは前記圧縮されていた圧縮スプリングの反発
力で保護カバーが時計方向に押されて元の位置に回動復
帰する。According to the protective cover of the rotary blade of the present invention, when the upper part of the rotary blade is pressed against the lower part of the work to cut, the tip of the upper part of the protective cover hits the work W to protect it. The cover rotates counterclockwise, and the compression is stored on one side of the protective cover in the direction of rotation (upper side in the figure) from the fixed pin fitted in the arcuate concave long groove of the slide holding member of the compression spring. The spring is compressed, and the compression spring housed from the fixed pin to the other rotation direction side of the protective cover (lower side in the figure) is not compressed. Therefore, the cutting of the work is completed, and the protective cover is protected from contact with the work. When the protective cover is released, the protective cover is pushed clockwise by the repulsive force of the compressed compression spring to return to its original position. When the lower part of the rotary blade is pressed against the upper part of the work for cutting, the lower end of the protective cover hits the work, the protective cover rotates clockwise, and the slide spring holding member of the compression spring is pressed. The compression spring accommodated on the other rotation direction side (lower side in the figure) of the protective cover is compressed from the fixed pin fitted in the arcuate concave long groove, and one rotation direction of the protective cover from the fixed pin. The compression spring accommodated on the side (upper side in the figure) is not compressed. Therefore, when cutting of the work is completed and the protective cover is released from the contact with the work, the protective cover repels the compressed spring. The force causes the protective cover to be pushed in the clockwise direction to return to the original position.
【００２１】この発明の回転刃の保護カバーは、以上の
ように作動するので、回転刃でワークを切断する際、従
来は保護カバーが固定または半固定であったため、保護
カバーから露出している回転刃の部分をワークに押し当
てなければならないので、ハンドルを握ってエンジン本
体を持ち上げながら切断する必要があり、作業性が悪か
ったが、この発明の回転刃の保護カバーの場合には、保
護カバーから露出している回転刃の部分をワークに押し
当てて切断して行く際に、保護カバーの先端の上下どち
らかの先端部がワークに当たると、当たった先端部が保
護カバーの側面の設けた圧縮スプリングの摺動保持部材
に収納した圧縮スプリングに抗して後退するように保護
カバーが回動し、ワークの切断が終わり、ワークと保護
カバーとの当接を離すと、保護カバーは前記圧縮スプリ
ングにより自動的に元の位置に回動復帰するので、作業
性を大幅に上げることができる。Since the rotary blade protective cover of the present invention operates as described above, when the workpiece is cut by the rotary blade, the protective cover is conventionally fixed or semi-fixed, and therefore is exposed from the protective cover. Since the rotary blade portion had to be pressed against the work, it was necessary to grasp the handle and cut while lifting the engine main body, and the workability was poor, but in the case of the rotary blade protective cover of the present invention, it was protected. When the rotary blade exposed from the cover is pressed against the work to cut, if either the upper or lower tip of the protective cover hits the work, the contacted tip is provided on the side of the protective cover. The protective cover rotates so as to retract against the compression spring housed in the slide holding member of the compression spring, cutting of the work is completed, and the work and the protective cover are not contacted. Strike, the protection cover is rotated automatically returns to its original position by the compression spring, it is possible to increase workability significantly.
【図１】この発明の回転刃の保護カバーを備えたエンジ
ンカッターの斜視図である。FIG. 1 is a perspective view of an engine cutter including a rotary blade protective cover of the present invention.
【図２】この発明の回転刃の保護カバーの分解斜視図で
ある。FIG. 2 is an exploded perspective view of a rotary blade protective cover of the present invention.
【図３】他の方向から見たこの発明の回転刃の保護カバ
ーの分解斜視図である。FIG. 3 is an exploded perspective view of the rotary blade protective cover of the present invention viewed from another direction.
【図４】この発明の回転刃の保護カバーの作動説明図で
ある。FIG. 4 is an operation explanatory view of the rotary blade protection cover of the present invention.
【図５】この発明の回転刃の保護カバーの他の実施例を
示す図である。FIG. 5 is a view showing another embodiment of the rotary blade protection cover of the present invention.
【図６】従来の回転刃の保護カバーを備えたエンジンカ
ッターの側面図である。FIG. 6 is a side view of an engine cutter having a conventional rotary blade protective cover.
【図７】他の従来の回転刃の保護カバーを備えたエンジ
ンカッターの側面図である。FIG. 7 is a side view of an engine cutter having another conventional rotary blade protective cover.
１ エンジンカッター本体 ２，２′ ギアボックス ３ フレームチューブ ４ 回転刃 ５ 回転刃の保護カバー ５′ 補強板 ５ａ 円弧状の長溝 ５ｂ 固定部 ５ｃ 下方の先端部 ５ｄ 上方の先端部 ６ 引張コイルスプリング ７ 固定部材 ８1 ，８2 ，８3 ハンドル ９ 小孔 １０ 着脱自在なピン １０ａ 鍔部 １０ｂ 筒体 １０ｃ 圧縮スプリング １０ｄ つまみ １１ 回転刃 １２ 保護カバー １２′ 補強板 １２ａ 上方の先端部 １２ｂ 下方の先端部 １２ｃ 一方の側面 １２ｄ 支持孔 １３ 支持部材 １４ 圧縮スプリングの摺動保持部材 １４ａ 円弧状の長溝 １４ｂ 円弧状の長孔 １４ｃ 押え板 １５ 軸受ハウジング １５′ ベアリングケース部 １５ａ 軸受突起 １５ｂ 突起 １５ｃ 孔 １６ 固定ピン １６ａ 頭 １７，１７′ 圧縮スプリング １８ 圧縮スプリングの摺動当接板 １９ 固定ネジ ２０ 第１のワッシャー ２１ 第２のワッシャー ２２ 固定ネジ ２３ カラー ２４ ノブ ２４ａ ネジ孔 ２５ エンジン本体 ２６ ハンドル1 Engine Cutter Main Body 2 and 2'Gear Box 3 Frame Tube 4 Rotating Blade 5 Rotating Blade Protective Cover 5'Reinforcing Plate 5a Arc-shaped Long Groove 5b Fixing Part 5c Lower Tip 5d Upper Tip 6 Tension Coil Spring 7 Fixing Members 8 1 , 8 2 , 8 3 Handle 9 Small hole 10 Detachable pin 10a Collar 10b Cylinder 10c Compression spring 10d Knob 11 Rotating blade 12 Protective cover 12 'Reinforcing plate 12a Upper tip 12b Lower tip 12c One side surface 12d Support hole 13 Supporting member 14 Sliding holding member 14a of compression spring 14a Arc-shaped long groove 14b Arc-shaped long hole 14c Holding plate 15 Bearing housing 15 'Bearing case part 15a Bearing projection 15b Projection 15c Hole 16 Fixing pin 16a Head 17, 17 'Compression spring 18 Sliding contact plate 19 of compression spring 20 first washer 21 and the second washer 22 fixing screw 23 Color 24 knob 24a screw hole 25 engine body 26 handle
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B23D 47/00 B27B 5/00 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) B23D 47/00 B27B 5/00
Claims (2)
外を覆うように回転刃１１の外周に沿って回動する保護
カバー１２を、その回動中心部を回動自在に支持部材１
３で支持して設け、この支持部材１３から所望半径離れ
た保護カバー１２の側面に、少なくとも保護カバー１２
の回動範囲の円弧状で凹状の長溝１４ａを有する圧縮ス
プリングの摺動保持部材１４を設け、この圧縮スプリン
グの摺動保持部材１４の円弧状で凹状の長溝１４ａの底
面に穿設した少なくとも保護カバー１２の回動範囲の円
弧状の長孔１４ｂが、軸受ハウジング１５に固定した固
定ピン１６に摺動自在に嵌合し、この固定ピン１６を挟
んで前記圧縮スプリングの摺動保持部材１４における保
護カバー１２の一方の回動方向側と他方の回動方向側と
の前記長溝１４ａにそれぞれ圧縮スプリング１７，１
７′を収納したことを特徴とする回転刃の保護カバー。1. A protective cover 12 which rotates along the outer periphery of the rotary blade 11 so as to cover a portion other than a portion of the rotary blade 11 which abuts on a work W, and a support member 1 which is rotatable about its rotation center.
3 provided on the side surface of the protective cover 12 which is separated from the supporting member 13 by a desired radius, and at least the protective cover 12 is provided.
The slide holding member 14 of the compression spring having the arc-shaped concave long groove 14a in the rotation range of is provided, and at least the protection provided on the bottom surface of the arc-shaped concave long groove 14a of the slide holding member 14 of the compression spring An arcuate long hole 14b in the rotation range of the cover 12 is slidably fitted to a fixed pin 16 fixed to the bearing housing 15, and the fixed pin 16 is sandwiched in the slide holding member 14 of the compression spring. The compression springs 17 and 1 are respectively provided in the long grooves 14a on one rotation direction side of the protective cover 12 and on the other rotation direction side.
Protective cover for rotary blades, containing 7 '.
外を覆うように回転刃１１の外周に沿って回動する保護
カバー１２を、その回動中心部を回動自在に支持部材１
３で支持して設け、この支持部材１３から所望半径離れ
た保護カバー１２の側面に、少なくとも保護カバー１２
の回動範囲の円弧状の長溝１４ａを有する圧縮スプリン
グの摺動保持部材１４を設け、この圧縮スプリングの摺
動保持部材１４の円弧状の長溝１４ａに摺動可能に収納
した圧縮スプリングの押え板１４ｃに穿設した少なくと
も保護カバー１２の回動範囲の円弧状の長孔１４ｂが、
軸受ハウジング１５に固定した固定ピン１６に摺動自在
に嵌合し、この固定ピン１６を挟んで前記圧縮スプリン
グの摺動保持部材１４における保護カバー１２の一方の
回動方向側と他方の回動方向側との前記長溝１４ａにそ
れぞれ圧縮スプリング１７，１７′を収納したことを特
徴とする回転刃の保護カバー。2. A protective cover 12 which rotates along the outer periphery of the rotary blade 11 so as to cover a portion other than the portion of the rotary blade 11 which abuts on a work W, and a supporting member 1 which is rotatable about its rotation center.
3 provided on the side surface of the protective cover 12 which is separated from the supporting member 13 by a desired radius, and at least the protective cover 12 is provided.
The compression spring slide holding member 14 having the circular arc-shaped long groove 14a in the rotation range is provided, and the compression spring retainer plate slidably accommodated in the circular arc-shaped long groove 14a of the compression spring slide holding member 14 is provided. At least the arc-shaped elongated hole 14b formed in 14c in the rotation range of the protective cover 12 is
A fixed pin 16 fixed to the bearing housing 15 is slidably fitted, and one side of the protective cover 12 of the compression spring slide holding member 14 and the other side of the protective cover 12 are rotated with the fixed pin 16 interposed therebetween. A protective cover for a rotary blade, characterized in that compression springs 17 and 17 'are housed in the long groove 14a on the direction side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16590595A JP3505696B2 (en) | 1995-06-30 | 1995-06-30 | Rotary blade protection cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16590595A JP3505696B2 (en) | 1995-06-30 | 1995-06-30 | Rotary blade protection cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0911032A JPH0911032A (en) | 1997-01-14 |
| JP3505696B2 true JP3505696B2 (en) | 2004-03-08 |
Family
ID=15821232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16590595A Expired - Fee Related JP3505696B2 (en) | 1995-06-30 | 1995-06-30 | Rotary blade protection cover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3505696B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014008873A1 (en) * | 2012-07-13 | 2014-01-16 | 苏州宝时得电动工具有限公司 | Portable cutting tool |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4575554B2 (en) * | 2000-06-23 | 2010-11-04 | 株式会社やまびこ | Engine cutter |
| US7059947B2 (en) | 2004-05-12 | 2006-06-13 | The Stanley Works | Portable rail cutting apparatus |
| JP4994740B2 (en) * | 2006-08-03 | 2012-08-08 | 株式会社マキタ | Opening and closing cover of cutting blade in cutting machine |
| JP7025274B2 (en) * | 2018-04-18 | 2022-02-24 | 株式会社やまびこ | Cutting machine |
| GB2601082B (en) * | 2019-11-11 | 2024-07-10 | Evolution Power Tools Ltd | A handheld circular cutter saw |
| CN112894017A (en) * | 2021-02-07 | 2021-06-04 | 黄河交通学院 | Protection device for heavy steel cutting |
-
1995
- 1995-06-30 JP JP16590595A patent/JP3505696B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014008873A1 (en) * | 2012-07-13 | 2014-01-16 | 苏州宝时得电动工具有限公司 | Portable cutting tool |
| US10189174B2 (en) | 2012-07-13 | 2019-01-29 | Positec Power Tools (Suzhou) Co., Ltd. | Portable cutting tool |
| US11192270B2 (en) | 2012-07-13 | 2021-12-07 | Positec Power Tools (Suzhou) Co., Ltd. | Portable cutting tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0911032A (en) | 1997-01-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20031205 |
|
| LAPS | Cancellation because of no payment of annual fees |